Thermal Properties & Calorimetry: JEE Main Physics Previous Year Questions

145 previous year questions from Thermal Properties & Calorimetry. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. 1.A cylindrical tod having temperature $T_1$ and $T_2$ at its ends. The rate of flow of heat is $Q_1$ cells. If all the linear dimensional are doubled keepin…
2. 2.A cylinder with fixed capacity of $67.2$ lit contains helium gas at $\text{STP}$. The amount of heat needed to raise the temperature of the gas by ${20}^{\circ }C$is:…
3. 3.If a black body emits 0.5 joules of energy per second when it is at ${27}^{\circ }C$, then the amount of energy emitted by it when it is at ${627}^{\circ }C$ will be
4. 4.A metal rod cools at the rate of $4^{\circ }C/\text{min}$ when its temperature is ${90}^{\circ }C$ and the rate of $1^{\circ }C/\text{min}$ when its temperature is…
5. 5.A cup of coffee cools from ${90}^{\circ }C$ to ${80}^{\circ }C$ in t minutes when the room temperature is ${20}^{\circ }C$. The time taken by the similar cup of coffee…
6. 6.Resistance of the wire is measured as 2$\Omega$ and 3$\Omega$ at 10°C and 30°C respectively. Temperature co-coefficient of resistance of the material of the wire is:
7. 7.A pendulum clock lose 12 s a day if the temperature is 40°C and gains 4 s a day if the temperature is 20°C. The temperature at which the clock will show correct time, and…
8. 8.A gun fires a lead bullet of temperature 300 K into a wooden block. The bullet having melting temperature of 600 K penetrates into the block and melts down. If the total…
9. 9.Steam at $100^0$C is passed into 20g of water at $10^0$C When water acquires a temperature of $80^0$C, the mass of water present will be: [ Take specific heat of wa…
10. 10.An aluminium sphere of 20 cm diameter is heated from 0ºC to 100ºC. Its volume changes by (given that coefficient of linear expansion for aluminium ${\alpha }_{AI}$ = 23 ×…
11. 11.A solid steel ball of diameter 3.6 mm acquired terminal velocity $2.45\times {10}^{-2}m/s$ while falling under gravity through an oil of density…
12. 12.The value of coefficient of volume expansion of glycerin is $5\times {10}^{-4}{K}^{-1}$. The fractional change in the density of glycerin for a rise of…
13. 13.Which of the following curves represent the variation of coefficient of volume expansion of an ideal gas at constant pressure?
14. 14.When heat Q is supplied to a diatomic gas of rigid molecules, at constant volume its temperature increases by $\text{∆}T$ The heat required to produce the same change in…
15. 15.When 100 g of a liquid A at 100° C is added to 50 g of a liquid B at temperature 75° C, the temperature of the mixture becomes 90° C. The temperature of the mixture, if 1…
16. 16.A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperature and volume for this process is ${\text{TV}}^x=$ constan…
17. 17.A body cools from 80°C to 60° in 5 minutes. The temperature for the surrounding is 20°C. The time it takes to cool from 60°C to 40°C is
18. 18.The surface temperature of the stars is determined using
19. 19.Due to cold weather a 1m water pipe of cross-sectional area $1c{m}^2$ is filled with ice at -$10^0$C. Resistive heating is used to melt the ice. Current 0.5A of is pass…
20. 20.Ice at –20° C is added to 50g of water at $40°C$, when the temperature of the mixture reaches $0°C$, it is formed that 20 g of ice is still unmelted. The amount of ice…
21. 21.Ice at -20°C is added to 50 g of water at 40° C. When the temperature of the mixture reaches 0°C, it is found that 20 g of ice is still unmelted. The amount of ice added…
22. 22.A diatomic gas with rigid molecules does $10J$ of work when expanded at constant pressure. What would be the heat energy absorbed by the gas, in this process?
23. 23.On celcius scale the temperature of body increases by ${40}^{\circ }C$. The increase in temperature on Fahrenheit scale is:
24. 24.A 3 m long wire of radius 3 mm shows an extension of 0.1 mm when loaded vertically by a mass of 50 kg in an experiment to determine Young's modulus. The value of Young's…
25. 25.An ideal gas is expanding such that $P{T}^3$ = constant. The coefficient of volume expansion of the gas is: